EP 3361639 A1 20180815 - PROGRAMMABLE VCO, METHOD OF CALIBRATING THE VCO, PLL CIRCUIT WITH PROGRAMMABLE VCO, AND SETUP METHOD FOR THE PLL CIRCUIT
Title (en)
PROGRAMMABLE VCO, METHOD OF CALIBRATING THE VCO, PLL CIRCUIT WITH PROGRAMMABLE VCO, AND SETUP METHOD FOR THE PLL CIRCUIT
Title (de)
PROGRAMMIERBARES VCO, VERFAHREN ZUR KALIBRIERUNG DES VCO, PLL-SCHALTUNG MIT PROGRAMMIERBAREM VCO UND EINSTELLVERFAHREN DER PLL-SCHALTUNG
Title (fr)
OSCILLATEUR COMMANDÉ EN TENSION (VCO) PROGRAMMABLE, PROCÉDÉ D'ÉTALONNAGE DU VCO, CIRCUIT PLL AVEC VCO PROGRAMMABLE ET PROCÉDÉ DE PARAMÉTRAGE DU CIRCUIT PLL
Publication
Application
Priority
EP 17156093 A 20170214
Abstract (en)
The PLL circuit comprises a phase/frequency detector (302), a loop filter (304, 306), a VCO (308) and a feedback loop (320). The VCO can be electrically disconnected from the PLL and comprises a programmable trimming circuit (316) and a current-controlled oscillator (318). For calibration the VCO is electrically disconnected from the loop filter and from the feedback loop, a constant reference voltage is applied to the voltage input (IN), a center frequency programming code (L) is applied to the trimming circuit, the center frequency programming code is iteratively adjusted until a desired centre frequency is obtained, a gain programming code (K) is applied to the trimming circuit while the adjusted code is still applied, and the gain programming code is iteratively adjusted until a desired gain is obtained. Then the VCO is connected to the PLL, which is then ready for normal operation.
IPC 8 full level
H03L 7/099 (2006.01)
CPC (source: EP US)
H03K 3/0315 (2013.01 - US); H03L 7/093 (2013.01 - US); H03L 7/099 (2013.01 - EP); H03L 7/0995 (2013.01 - US); H03L 7/10 (2013.01 - US); H03L 7/187 (2013.01 - US); H03L 7/0995 (2013.01 - EP)
Citation (applicant)
- US 5942949 A 19990824 - WILSON WILLIAM B [US], et al
- US 6552618 B2 20030422 - NELSON DALE H [US], et al
- US 6859073 B1 20050222 - DAI LIANG [US], et al
Citation (search report)
- [XI] US 2002075080 A1 20020620 - NELSON DALE H [US], et al
- [I] US 5459653 A 19951017 - SETO JIM M N [CA], et al
- [I] US 2010203848 A1 20100812 - DARABI HOOMAN [US]
- [I] US 5382922 A 19950117 - GERSBACH JOHN E [US], et al
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3361639 A1 20180815; CN 110235369 A 20190913; CN 110235369 B 20231010; US 10833686 B2 20201110; US 2019372578 A1 20191205; WO 2018149595 A1 20180823
DOCDB simple family (application)
EP 17156093 A 20170214; CN 201880008998 A 20180123; EP 2018051559 W 20180123; US 201816478385 A 20180123